Title: Strap-down attitude and heading reference system

Abstract: Estimators of a vehicle's position and attitude with respect to the earth are generated continuously by integrating the outputs of translational and rotational accelerometers that are attached to the vehicle. These estimators are corrected by comparing them to corresponding reference dynamic variables measured independently by instruments onboard the vehicle. The estimators are modified by slowly responding servo loops to equal their corresponding reference variables. Differences between certain of the estimators and their corresponding reference dynamic variables are used in generating feedback signals for correcting other of the estimators. By combining various of the estimators, system outputs representing sideslip angle and change in cross-track velocity can be generated.

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Inventors: Land, Robert P. (Los Angeles, CA, US)

Application Number: 930672
Filing Date: 1978-08-03
Publication_date: 1981-03-03
Assignee: Dynamic Sciences International, Inc. (Van Nuys, CA)
Primary Class(es): 701/220 244/175, 701/221
Other Classes:
US Patent Ref:

3237887	Mar, 1966	Theiss	364/453.
3597598	Aug, 1971	McAllister et al.	364/453.
3699316	Oct, 1972	Lope, Jr.	364/453.
3872284	Mar, 1975	Seligman et al.	364/453.
3979090	Sep, 1976	Brickner et al.	364/454.

Other Refs:
Primary Examiner: Smith, Jerry
Assistant Examiner:
Attorney: Kleinberg; Marvin H.